Evaluation of Black Alder (alnus Glutinosa) Wood Structure and Opportunities For Wider Use of Timber In Structural Elements

When greshly cut, black alder (Alnus glutinosa (L.), Gaertn.) timber presents a light orange colour and during air exposure it changes to red-orange. European alder tends to be light tan to reddish brown; color darkens and reddens with age. Large aggregate rays appear as accasional small streaks on the intensity of the colour that can be mistaken for defects in the wood. Heart colouring and heartwood herd rot are not clearly distinguishable from each other. Although the tree has a wide distribution throughout Europe there are no unified quality requirements for roundwood assortments due to lack of scientifically approved information related to wood structure. the main goal of study is to work out the Alnus glutinosa roundwood, harvested in final felling methods: density - according to ISO-13061-2-2014; Compression strength paralel to the grain -according to ISO- 13061-17-2017; three point bending strength and modulus of elasticity - according to 13061-3(4)2014. The results of study whwre the strength properties of Alnus glunosa saund timber, timber coloures coused by fungi when strength parameters aren't signitificantly affected, early stage of rot, characterized by discolourred fibres and pathes in the wood, where the general texture and strength properties only start being affected were investigated would help for practical applications so that this wood species can be processed more efficiently for value -added products.